Knockout Sinks, Shower and Baths Unblocker 500ml is a specially formulated high alkaline sodium hydroxide solution designed to clear the types of biologcal build-up commonly found in kitchen and bathroom drains. Intended for use in completely or partially blocked slow flowing drains, this product rapidly burns through blockages cause by food and body fat, grease and hair. This is a ready to use product that should be applied neat.
